JK
John Kowalski — 1930 US Census Record
Model Tree available1930 United States Federal Census · Presque Isle, Michigan
Our Model Tree links this John Kowalski across the 1920, 1930 and 1940 US Censuses in Presque Isle, Michigan (XGBoost, ~Confirmed), with identified parents John & Mary — first a head (b.~1907), then head of a 3-person household.
Age 23
b. ~1907
Male
Head
Born: Michigan
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Presque Isle, Michigan |
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 20 |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Additional Details | |
| Occupation | Laborer |
| Industry | Quarries |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 5 |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Laborer |
| Township / Ward | Posen Village |
| Est. Birth Year | ~1907 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Alice Kowalski | Spouse | — | 24 | ~1906 |
| David Kowalski | Son | — | 1 | ~1929 |
| John Kowalski | Head | — | 23 | ~1907 |
Census Appearances
1920
Presque Isle, …
Son, age 13
Presque Isle, Michigan · implied b. ~1907 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Presque Isle, …
Head, age 23
Presque Isle, Michigan · implied b. ~1907 — 3 household members
| Surname | Kowalski |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 20 |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Occupation | Laborer |
| Industry | Quarries |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 5 |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Presque-Isle-County, Michigan
Head, age 33
Presque-Isle-County, Michigan · implied b. ~1907 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kowalske |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Metz Township |
| 1935 Residence (County) | Presque Isle |
| Occupation | laborer |
| Industry | REA |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 440 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links John Kowalski across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Kowalski (~0.92 confidence) and mother Mary Kowalski (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Kowalski
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Mary Kowalski
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Kowalski
Head · 1930 · age 23 · b. ~1907 · Michigan
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Presque Isle, Michigan
Open full size
1930 US Federal Census — Presque Isle, Michigan
Page Contents
50 people indexed on this census page (ia:1930:michigancensus00reel1021:0114)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Albert Seemann | 32 | Head | Clergyman | Missouri |
| 2 | Augusta Seemann | 28 | Wife | — | Michigan |
| 3 | Edward Szturmowski | 36 | Head | Clergyman | Michigan |
| 4 | Theresa Konieczny | 27 | Servant | Servant | Michigan |
| 5 | Albrecht Kowalewsky | 35 | Head | Mail Carrier | Michigan |
| 6 | Theresa Kowalewsky | 29 | Wife | — | Michigan |
| 7 | Harry Kowalewsky | 12 | Son | — | Michigan |
| 8 | Irene Kowalewsky | 8 | Daughter | — | Michigan |
| 9 | Warren Kowalewsky | 7 | Son | — | Michigan |
| 10 | Malcolm Kowalewsky | 2 | Son | — | Michigan |
| 11 | Edward Hardies | 65 | Father-in-law | — | Germany |
| 12 | Stanislaus Konieczny | 53 | Head | Retail Merchant | Poland |
| 13 | Anna Konieczny | 53 | Wife | — | Ohio |
| 14 | Alex Konieczny | 21 | Son | Clerk | Michigan |
| 15 | Clara Konieczny | 19 | Daughter | Saleswoman | Michigan |
| 16 | Stanislaus Konieczny | 16 | Son | Salesman | Michigan |
| 17 | Alice Konieczny | 12 | Daughter | — | Michigan |
| 18 | Frank Konieczny | 94 | Father | — | Poland |
| 19 | Cecil White | 28 | Head | Buyer | Michigan |
| 20 | Elva White | 32 | Wife | — | Michigan |
| 21 | June White | 6 | Daughter | — | Michigan |
| 22 | Robert White | 4 | Son | — | Michigan |
| 23 | Alice White | 1 | Daughter | — | Michigan |
| 24 | Harriet White | 53 | Mother | — | Michigan |
| 25 | Ignatius Burzych | 48 | Head | Laborer | Michigan |
| 26 | Mary Burzych | 33 | Wife | — | Michigan |
| 27 | Martha Burzych | 15 | Daughter | — | Michigan |
| 28 | Joseph Burzych | 14 | Son | — | Michigan |
| 29 | John Burzych | 13 | Son | — | Michigan |
| 30 | Gertrude Burzych | 11 | Daughter | — | Michigan |
| 31 | Regina Burzych | 10 | Daughter | — | Michigan |
| 32 | Theresa Burzych | 8 | Daughter | — | Michigan |
| 33 | Arthur Burzych | 7 | Son | — | Michigan |
| 34 | Harriet Burzych | 6 | Daughter | — | Michigan |
| 35 | Grace Burzych | 4 | Daughter | — | Michigan |
| 36 | Beatrice Burzych | 3 | Daughter | — | Michigan |
| 37 | Eugene Burzych | 1 | Son | — | Michigan |
| 38 | Estella Wisniewski | 43 | Head | — | Michigan |
| 39 | Helen Wisniewski | 21 | Daughter | — | Michigan |
| 40 | Harry Wisniewski | 15 | Son | — | Michigan |
| 41 | Mary Wisniewski | 13 | Daughter | — | Michigan |
| 42 | Edward Wisniewski | 11 | Son | — | Michigan |
| 43 | Florence Wisniewski | 8 | Daughter | — | Michigan |
| 44 | John Urban | 41 | Lodger | Laborer | Michigan |
| 45 | John Kowalski THIS PERSON | 23 | Head | Laborer | Michigan |
| 46 | Alice Kowalski | 24 | Wife | Teacher | Michigan |
| 47 | David B. Kowalski | 1 | Son | — | Michigan |
| 48 | Carl Fredke | 73 | Head | — | Germany |
| 49 | Augusta Fredke | 75 | Wife | — | Germany |
| 50 | Philip Sytek | 39 | Head | Retail Merchant | Michigan |
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)